Keys for tests generated by executing:

```
kumactl generate signing-key --format=pem > samplekey.pem
kumactl generate public-key --signing-key-path=samplekey.pem > publickey.pem
# The same public key as above, but encoded in PKIX, not PKCS
openssl rsa -RSAPublicKey_in -in publickey.pem -pubout > publickey-pkix.pem

kumactl generate signing-key --format=pem > samplekey-2.pem
kumactl generate public-key --signing-key-path=samplekey-2.pem > publickey-2.pem
```
